Analysis
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max time kernel
147s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
07-04-2024 23:11
Behavioral task
behavioral1
Sample
8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe
Resource
win10v2004-20240226-en
General
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Target
8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe
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Size
424KB
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MD5
adde7a82f57387410210b34ebce305ca
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SHA1
416e571e09e4a713f5b8ea33a5b64da9990e1a17
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SHA256
8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1
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SHA512
9aac8f21198c1e838cf4a6b69ff17f3b714ab72fa452ff001e02e5546a3d9cf68bc4848a2a59e7e7effb88f522aab82767d0740b6359bbf7bf927ef4e31968b2
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SSDEEP
3072:nQC+GXgmYA/npA+fkBEcBoUTqp8YVE83jy11BGWjyLmar5FCO3ztKSwni9JCa2i:nQqgmYA/npAJBBo4q2YXAyL1L3BYq
Malware Config
Signatures
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Detects executables containing base64 encoded User Agent 2 IoCs
Processes:
resource yara_rule behavioral2/memory/2224-15-0x0000000010000000-0x000000001004E000-memory.dmp INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent behavioral2/memory/2224-17-0x0000000010000000-0x000000001004E000-memory.dmp INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent -
UPX dump on OEP (original entry point) 5 IoCs
Processes:
resource yara_rule behavioral2/memory/3200-10-0x0000000000400000-0x0000000000469000-memory.dmp UPX \??\c:\Program Files\btbzw\aqdzp.dll UPX behavioral2/memory/2224-14-0x0000000010000000-0x000000001004E000-memory.dmp UPX behavioral2/memory/2224-15-0x0000000010000000-0x000000001004E000-memory.dmp UPX behavioral2/memory/2224-17-0x0000000010000000-0x000000001004E000-memory.dmp UPX -
Deletes itself 1 IoCs
Processes:
tknkl.exepid process 3200 tknkl.exe -
Executes dropped EXE 2 IoCs
Processes:
tknkl.exeaqd.exepid process 3200 tknkl.exe 2224 aqd.exe -
Loads dropped DLL 1 IoCs
Processes:
aqd.exepid process 2224 aqd.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Processes:
resource yara_rule behavioral2/memory/1296-0-0x0000000000400000-0x0000000000469000-memory.dmp upx behavioral2/memory/1296-2-0x0000000000400000-0x0000000000469000-memory.dmp upx C:\Users\Admin\AppData\Local\Temp\tknkl.exe upx behavioral2/memory/3200-10-0x0000000000400000-0x0000000000469000-memory.dmp upx -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
aqd.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\btbzw\\aqd.exe \"c:\\Program Files\\btbzw\\aqdzp.dll\",Compliance" aqd.exe -
Enumerates connected drives 3 TTPs 2 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
aqd.exedescription ioc process File opened (read-only) \??\b: aqd.exe File opened (read-only) \??\a: aqd.exe -
Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
Processes:
aqd.exedescription ioc process File opened for modification \??\PHYSICALDRIVE0 aqd.exe -
Drops file in Program Files directory 4 IoCs
Processes:
tknkl.exedescription ioc process File opened for modification \??\c:\Program Files\btbzw tknkl.exe File created \??\c:\Program Files\btbzw\aqdzp.dll tknkl.exe File created \??\c:\Program Files\btbzw\aqd.exe tknkl.exe File opened for modification \??\c:\Program Files\btbzw\aqd.exe tknkl.exe -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
aqd.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString aqd.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 aqd.exe -
Runs ping.exe 1 TTPs 1 IoCs
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Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
aqd.exepid process 2224 aqd.exe 2224 aqd.exe 2224 aqd.exe 2224 aqd.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
aqd.exedescription pid process Token: SeDebugPrivilege 2224 aqd.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
Processes:
8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exetknkl.exepid process 1296 8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe 3200 tknkl.exe -
Suspicious use of WriteProcessMemory 12 IoCs
Processes:
8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.execmd.exetknkl.exedescription pid process target process PID 1296 wrote to memory of 4420 1296 8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe cmd.exe PID 1296 wrote to memory of 4420 1296 8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe cmd.exe PID 1296 wrote to memory of 4420 1296 8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe cmd.exe PID 4420 wrote to memory of 4380 4420 cmd.exe PING.EXE PID 4420 wrote to memory of 4380 4420 cmd.exe PING.EXE PID 4420 wrote to memory of 4380 4420 cmd.exe PING.EXE PID 4420 wrote to memory of 3200 4420 cmd.exe tknkl.exe PID 4420 wrote to memory of 3200 4420 cmd.exe tknkl.exe PID 4420 wrote to memory of 3200 4420 cmd.exe tknkl.exe PID 3200 wrote to memory of 2224 3200 tknkl.exe aqd.exe PID 3200 wrote to memory of 2224 3200 tknkl.exe aqd.exe PID 3200 wrote to memory of 2224 3200 tknkl.exe aqd.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe"C:\Users\Admin\AppData\Local\Temp\8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe"1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1296 -
C:\Windows\SysWOW64\cmd.execmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\tknkl.exe "C:\Users\Admin\AppData\Local\Temp\8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe"2⤵
- Suspicious use of WriteProcessMemory
PID:4420 -
C:\Windows\SysWOW64\PING.EXEping 127.0.0.1 -n 23⤵
- Runs ping.exe
PID:4380 -
C:\Users\Admin\AppData\Local\Temp\tknkl.exeC:\Users\Admin\AppData\Local\Temp\\tknkl.exe "C:\Users\Admin\AppData\Local\Temp\8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe"3⤵
- Deletes itself
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3200 -
\??\c:\Program Files\btbzw\aqd.exe"c:\Program Files\btbzw\aqd.exe" "c:\Program Files\btbzw\aqdzp.dll",Compliance C:\Users\Admin\AppData\Local\Temp\tknkl.exe4⤵
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2224
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Pre-OS Boot
1Bootkit
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Replay Monitor
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Downloads
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Filesize
60KB
MD5889b99c52a60dd49227c5e485a016679
SHA18fa889e456aa646a4d0a4349977430ce5fa5e2d7
SHA2566cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910
SHA51208933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641
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Filesize
424KB
MD5d2b0c50d5c59811e2e981d67c3a7ca6e
SHA121c82947de3f1a7114c5052e7f3e5f9f54b4bec6
SHA256dd485b2001e0570f0019f3509cad809046f458cb4eaccb9fdbfea76721bd299b
SHA5128a9f9977eb79bb33ce722ef1e098313defd1f33fbc594e494a4d4ceef13d10f99d2cbd331f64dc3edafd75e0c93627a46d1cc85664771849704c0bf8d1f8ad20
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Filesize
141KB
MD5d45f9efa3c3875e9823909e709f92129
SHA1bc023e74365b6dbf10f64b48bc8f98871e76d701
SHA256e51cc7aaa0c3a52caa2508fddc217a156445b32a87899e89f0c7e96a4d62aedc
SHA5128d1d33704cfcabdf4335ead94faf22b75db8f957b94c2c00d201a0f240af65f1261c9c1a5ced8e537ab7e9f4aa5cc466c5d2d9cf09f200b390f117b46f0f23e2